Bump actions/checkout from 2 to 4

Bumps [actions/checkout](https://github.com/actions/checkout) from 2 to 4.
- [Release notes](https://github.com/actions/checkout/releases)
- [Changelog](https://github.com/actions/checkout/blob/main/CHANGELOG.md)
- [Commits](https://github.com/actions/checkout/compare/v2...v4)

---
updated-dependencies:
- dependency-name: actions/checkout
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

.github/workflows/update_wiki.yml

@@ -18,10 +18,10 @@ jobs:
         run: |
           sudo apt install -y make rsync
       # Checkout Main Repo
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v4
 
       # Checkout Wiki Repo
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v4
         with:
           repository: ${{github.repository}}.wiki
           persist-credentials: true